Patents by Inventor Chin-Fu Chang

Chin-Fu Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10310693
    Abstract: A controller for position detection is disclosed. At least one first 1-D position corresponding to at least one external object is determined based on signals of a plurality of first sensors by self-capacitance detection. Then, at least one second 1-D position corresponding to the at least one first 1-D position is determined based on signals of a plurality of second sensors by mutual-capacitance detection, wherein each second 1-D position is determined based on a differential sensing information whose each value is based on signals of two second sensors by mutual-capacitance detection.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: June 4, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Patent number: 10303271
    Abstract: A transmitter is provided by the present application. The transmitter comprises a tip section, wherein the transmitter is configured for generating a first signal according to a pressure level applying to the tip section and for transmitting an electric signal including the first signal via the tip section, wherein a property of the electric signal reflects the pressure level.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: May 28, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Patent number: 10268327
    Abstract: The present invention provides a touch sensitive method including: transmitting a driving signal via a first driving electrode of a touch screen during a first blanking interval; and sensing the driving signal via a plurality of sensing electrodes of the touch screen during the first blanking interval for detecting an external conductive object on or near the first driving electrode.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: April 23, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Patent number: 10261633
    Abstract: The present application provides a touch sensitive processing method for configuring interconnection parameters between a touch panel and a touch sensitive processing apparatus in an electronic system. The method comprises: connecting, by an interconnection network of the apparatus, P first circuits of a first apparatus connector with a detecting circuit of the touch sensitive processing apparatus, respectively; detecting, by the detecting circuit, an impedance value of each of the first circuits sequentially via the interconnection network; and determining that there are M consecutive first touch sensitive electrodes connected to the M consecutive first circuits based on the impedance values.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: April 16, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10261610
    Abstract: The present invention provides a touch control apparatus capable of detecting a tilt angle and an axial direction of a stylus, wherein the stylus includes a first electrode at a tip of the stylus, a second electrode surrounding the first electrode. and a first button; the touch control apparatus comprising: a sensing circuit connected to a touch screen; a signal strength detecting circuit; and a processing module connected to the sensing circuit and the signal strength detection circuit, the processing module being configured for determining the status of the first button based on the modulation sequence; and determining the tilt angle and the axial direction of the stylus based on the electrical signals of a plurality of time periods.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: April 16, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20190107903
    Abstract: A touch sensitive processing method applicable to a touch sensitive processing device connecting with a touch sensitive screen, wherein the touch sensitive screen includes multiple first electrodes being parallel to each other and multiple second electrodes being parallel to each other, wherein both the first and the second electrodes form multiple intersectional points, the touch sensitive processing device comprises a driving circuit configured to connect with at least one of the first electrodes of the touch sensitive screen; a sensing circuit configured to connect with the second electrodes; and a processor configured to connect with the driving circuit and the sensing circuit and to perform the touch sensitive processing method, wherein the touch sensitive processing method comprising: commanding the driving circuit to continuously drive the at least one of the first electrodes three times; and commanding the sensing circuit to detect changes in capacitance by the second electrodes for detecting an objec
    Type: Application
    Filed: December 7, 2018
    Publication date: April 11, 2019
    Inventor: CHIN-FU CHANG
  • Patent number: 10254897
    Abstract: The present application provides a touch sensitive processing method adaptable to a touch sensitive processing apparatus for detecting defects of a touch panel in an electronic system. The method comprises: connecting, by an interconnection network of the touch sensitive processing apparatus, second touch sensitive electrodes with a detecting circuit of the apparatus, respectively, connecting, by the interconnection network, at least one touch sensitive electrode with a drive circuit of the apparatus; having the drive circuit emit a drive signal via the at least one touch sensitive electrode; having the detecting circuit detect the drive signal via the second touch sensitive electrodes; calculating a phase shift between each neighboring pair of second touch sensitive electrodes receiving the drive signal; and determining at least one second touch sensitive electrode of the pair is faulty when the phase shift is larger than a phase shift threshold and reporting information related to the defect to a host.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: April 9, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10254861
    Abstract: The present invention provides a stylus for providing a tilt angle and an axial direction of a stylus body comprising: a first electrode at a tip of the stylus; a second electrode surrounding the first electrode; a first button; and a control module connected to the first and the second electrodes and the button, wherein the control module is configured for instructing the first electrode and the second electrode to each perform one of a plurality of modulations in each of a plurality of time periods based on the status of the first button, wherein the plurality of modulations include the following three types: instructing the first electrode to emit an electrical signal; instructing the second electrode to emit an electrical signal; and instructing both the first and the second electrodes to emit electrical signals simultaneously.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: April 9, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10241619
    Abstract: A touch sensitive processing apparatus is provided for detecting whether a touch panel is mostly covered by a conductive liquid or object. The apparatus includes a driving circuit for providing a driving signal to one of multiple parallel electrodes of the touch panel; a sensing circuit for sensing multiple values by the electrodes with respect to the driving signal; and a processor. The processor is configured for commanding the driving circuit to provide the driving signal and receiving the multiple sensing values from the sensing circuit; calculating a maximum difference between the largest and the smallest values of the sensing values; and if the maximum difference is less than a threshold, then determining that the touch panel is mostly covered by a conductive liquid or object.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: March 26, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Patent number: 10185452
    Abstract: The present invention provides a touch sensitive controlling method comprising continuously driving electrode(s) of a touch sensitive screen three times, wherein the two cease-driving durations between the three drivings are different.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: January 22, 2019
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Patent number: 10162438
    Abstract: The present invention provides a stylus for providing a tilt angle and an axial direction of a stylus body, including: a first electrode at a tip of the stylus; a second electrode surrounding the first electrode, wherein the first electrode and the second electrode are not electrically coupled; and a control module connected to the first electrode and the second electrode, wherein the control module is configured to have the first electrode emitting a first-time-period electrical signal and the second electrode coupled to a direct current voltage during a first time period, the control module is further configured to have the first electrode emitting a second-time-period electrical signal and the second electrode floated during a second time period.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: December 25, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10162468
    Abstract: When at least one external object approaches or touches a touch sensor, profiles in a scanning signal corresponding to each external object will appear. The smallest value between the profiles corresponding to a first and a second external object is designated as a division value when the profiles corresponding to the first and the second external objects overlap. The overlapping profiles can be divided into the portion of the first external object and the portion of the second external object, respectively.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: December 25, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10156936
    Abstract: The present application provides a method for determining correspondences between multiple display processing apparatuses and multiple touch sensitive processing apparatuses. The method comprises: having a first display processing apparatus display a first prompt information on a first touch screen; having a first and a second touch sensitive processing apparatuses receive a first touch event; when the first touch event is from the first touch sensitive processing apparatus, determining the first touch screen is connected with the first touch sensitive processing apparatus; and when the first touch event is from the second touch sensitive processing apparatus, determining the first touch screen is connected with the second touch sensitive processing apparatus.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: December 18, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20180329539
    Abstract: The present invention provides a touch sensitive processing apparatus configured for: according to one or more first touch line pieces corresponding to one or more external objects in a first set, transmitting driving signals via one or more first electrodes corresponding to the one or more first touch line pieces and sensing the driving signals via multiple second electrodes to form at least a one-dimensional sensing information; composing a two-dimensional sensing information according to the at least a one-dimensional sensing information; preserving sensing information which is corresponding to one or more second touch line pieces in the two-dimensional sensing information, wherein the one or more second touch line pieces is a part of a second set which is corresponding to the one or more external objects; calculating one or more positions of the one or more external objects according to the two-dimensional sensing information.
    Type: Application
    Filed: May 10, 2018
    Publication date: November 15, 2018
    Inventor: CHIN-FU CHANG
  • Patent number: 10101372
    Abstract: The method and device for analyzing position are disclosed. By analyzing sensing information with at least one zero-crossing, each position can be analyzed. The number of analyzed positions may be different from the number of zero-crossings. When the number of analyzed positions is different from the number of zero-crossing, the number of analyzed positions is more than one.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: October 16, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Cheng-Han Lee, Chi-Hao Tang, Shun-Lung Ho
  • Patent number: 10095350
    Abstract: The present invention provides a processing device, which includes a plurality of digital demodulators and an information transmitting module. Each of the digital demodulators is configured to generate in-phase and quadrature signal information corresponding to a frequency. The information transmitting module is configured to receive, process, and transmit the in-phase and quadrature signal information.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: October 9, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang
  • Publication number: 20180275782
    Abstract: When a touch sensor is approached or touched by an object having a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined.
    Type: Application
    Filed: May 30, 2018
    Publication date: September 27, 2018
    Inventors: Chin-Fu CHANG, Shang-Tai YEH, Shih-Hao CHIU
  • Publication number: 20180267632
    Abstract: The present invention provides a touch control apparatus capable of detecting a tilt angle and an axial direction of a stylus, wherein the stylus includes a first electrode at a tip of the stylus, a second electrode surrounding the first electrode. and a first button; the touch control apparatus comprising: a sensing circuit connected to a touch screen; a signal strength detecting circuit; and a processing module connected to the sensing circuit and the signal strength detection circuit, the processing module being configured for determining the status of the first button based on the modulation sequence; and determining the tilt angle and the axial direction of the stylus based on the electrical signals of a plurality of time periods.
    Type: Application
    Filed: May 18, 2018
    Publication date: September 20, 2018
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Patent number: 10073570
    Abstract: A mutual capacitance touch sensing device inspection method is performed by: measuring the capacitive coupling amounts of all the crossover points between driving lines and sensing lines of the touch sensing panel, and then integrating the measured capacitive coupling amounts and the respective crossover point coordinate data into respective 2-D sensing information for creating local 2-D sensing information by integrating each predetermined number of adjacent crossover points and the respective capacitive coupling amounts so that the processor can get respective flatness indexes and integrate the flatness indexes and the respective coordinate data of the local 2-D sensing information into a flatness index information for determine the touch sensing panel to be a qualified, defective-acceptable or defective product.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: September 11, 2018
    Assignee: Egalax_Empia Technology Inc.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 10061410
    Abstract: The present invention provides a set of transmitters which transmits signals concurrently. The set comprises a first role transmitter configured to transmit a first electrical signal according to a first role transmitter status to a touch sensitive device; and a second role transmitter configured to transmit a second electrical signal according to a second role transmitter status to said touch sensitive device. In consequence, the touch sensitive device is configured to analyze the first and the second electrical signals concurrently transmitted and to get the first and the second role transmitter status as well as a first relative position between the first role transmitter and the touch sensitive device and a second relative position between the second role transmitter and the touch sensitive device.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: August 28, 2018
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventor: Chin-Fu Chang